Drum rudiments

I'm currently learning drum rudiments. While they're not required to play steel tongue drums, I think anyone serious about getting the best of any percussive instrument should really check them out. It's basically the grammar of percussions.

https://en.wikipedia.org/wiki/Drum_rudiment
http://vicfirth.com/40-essential-rudiments
http://www.ninjadrummist.com

Steel tongue drums quick start

This is a bunch of links that can help to grasp quickly what steel tongue drums are about. Some are more interesting than others, and none gives an in-depth method.

http://amsteeltonguedrums.com/more/how-to-play
https://hapidrum.co/how-to-play-a-hapi-drum.aspx
https://idiopan.com/blogs/news/beginning-traditionally
https://spinditty.com/learning/How-to-Play-the-Hapi-Drum
https://ufodrum.net/how-to-play-on-ufodrum-llesson-1

Steel tongue drums tutorial videos

I haven't watched these ones in detail yet, but the guy who made them knows what he's talking about (and he also makes drums).

https://www.youtube.com/watch?v=x2798g2W_6Y (part 1)
https://www.youtube.com/watch?v=PsAOsj4lV4Y (part 2)
https://www.youtube.com/watch?v=mz4JzgCAcTQ (patterns)